The ratio of length to breadth of a rectangle is 5:4. If the sum of the length and breadth of the rectangle is 36 cm, then find the area (cm2) of the rectangle.
Let the length and breadth of the rectangle be 5x cm and 4x cm, respectively. According to the question, 5x + 4x = 36 Or, x = 36/9 = 4 Therefore, area of the rectangle = 5x × 4x = 20x2 = 320 cm2
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